Yeah meth is essentially for anti-detonation at high boost, you won't get any benefit out of it stock. SSAFC will get you pretty far, a lot of guys here run it on built disco potato cars, and it can handle up to ~15 psi iirc. It's a good investment as long as you feel comfortable wiring it in. An AFR gauge would be a good investment as well-MAKE SURE it's a true wideband sensor, though; narrowband just tells you if you're over/under 14.7:1, it won't give you a direct reading and it's useless for tuning.